src/rt/rtrace.c

#ifndef lint
static const char       RCSid[] = "$Id: rtrace.c,v 2.33 2003/07/21 22:30:19 schorsch Exp $";
#endif
/*
 *  rtrace.c - program and variables for individual ray tracing.
 */

#include "copyright.h"

/*
 *  Input is in the form:
 *
 *      xorg    yorg    zorg    xdir    ydir    zdir
 *
 *  The direction need not be normalized.  Output is flexible.
 *  If the direction vector is (0,0,0), then the output is flushed.
 *  All values default to ascii representation of real
 *  numbers.  Binary representations can be selected
 *  with '-ff' for float or '-fd' for double.  By default,
 *  radiance is computed.  The '-i' or '-I' options indicate that
 *  irradiance values are desired.
 */

#include  <time.h>

#include  "platform.h"
#include  "ray.h"
#include  "otypes.h"
#include  "resolu.h"

CUBE  thescene;                         /* our scene */
OBJECT  nsceneobjs;                     /* number of objects in our scene */

int  dimlist[MAXDIM];                   /* sampling dimensions */
int  ndims = 0;                         /* number of sampling dimensions */
int  samplendx = 0;                     /* index for this sample */

int  imm_irrad = 0;                     /* compute immediate irradiance? */
int  lim_dist = 0;                      /* limit distance? */

int  inform = 'a';                      /* input format */
int  outform = 'a';                     /* output format */
char  *outvals = "v";                   /* output specification */

int  do_irrad = 0;                      /* compute irradiance? */

void  (*trace)() = NULL;                /* trace call */

extern void  ambnotify(), tranotify();
void  (*addobjnotify[])() = {ambnotify, tranotify, NULL};
char  *tralist[128];                    /* list of modifers to trace (or no) */
int  traincl = -1;                      /* include == 1, exclude == 0 */
#define  MAXTSET        511             /* maximum number in trace set */
OBJECT  traset[MAXTSET+1]={0};          /* trace include/exclude set */

int  hresolu = 0;                       /* horizontal (scan) size */
int  vresolu = 0;                       /* vertical resolution */

double  dstrsrc = 0.0;                  /* square source distribution */
double  shadthresh = .05;               /* shadow threshold */
double  shadcert = .5;                  /* shadow certainty */
int  directrelay = 2;                   /* number of source relays */
int  vspretest = 512;                   /* virtual source pretest density */
int  directvis = 1;                     /* sources visible? */
double  srcsizerat = .2;                /* maximum ratio source size/dist. */

COLOR  cextinction = BLKCOLOR;          /* global extinction coefficient */
COLOR  salbedo = BLKCOLOR;              /* global scattering albedo */
double  seccg = 0.;                     /* global scattering eccentricity */
double  ssampdist = 0.;                 /* scatter sampling distance */

double  specthresh = .15;               /* specular sampling threshold */
double  specjitter = 1.;                /* specular sampling jitter */

int  backvis = 1;                       /* back face visibility */

int  maxdepth = 8;                      /* maximum recursion depth */
double  minweight = 2e-3;               /* minimum ray weight */

char  *ambfile = NULL;                  /* ambient file name */
COLOR  ambval = BLKCOLOR;               /* ambient value */
int  ambvwt = 0;                        /* initial weight for ambient value */
double  ambacc = 0.1;                   /* ambient accuracy */
int  ambres = 256;                      /* ambient resolution */
int  ambdiv = 1024;                     /* ambient divisions */
int  ambssamp = 512;                    /* ambient super-samples */
int  ambounce = 0;                      /* ambient bounces */
char  *amblist[128];                    /* ambient include/exclude list */
int  ambincl = -1;                      /* include == 1, exclude == 0 */


static RAY  thisray;                    /* for our convenience */

static void  oputo(), oputd(), oputv(), oputl(), oputL(), oputc(),
                oputp(), oputn(), oputN(), oputs(), oputw(), oputm();

static void  ourtrace(), tabin();
static void  (*ray_out[16])(), (*every_out[16])();
static int  castonly = 0;

static void  puta(), putf(), putd();

static void  (*putreal)();

void    bogusray(), rad(), irrad(), printvals();


void
quit(code)                      /* quit program */
int  code;
{
#ifndef  NON_POSIX /* XXX we don't clean up elsewhere? */
        headclean();            /* delete header file */
        pfclean();              /* clean up persist files */
#endif
        exit(code);
}


char *
formstr(f)                              /* return format identifier */
int  f;
{
        switch (f) {
        case 'a': return("ascii");
        case 'f': return("float");
        case 'd': return("double");
        case 'c': return(COLRFMT);
        }
        return("unknown");
}


void
rtrace(fname)                           /* trace rays from file */
char  *fname;
{
        long  vcount = hresolu>1 ? hresolu*vresolu : vresolu;
        long  nextflush = hresolu;
        FILE  *fp;
        double  d;
        FVECT  orig, direc;
                                        /* set up input */
        if (fname == NULL)
                fp = stdin;
        else if ((fp = fopen(fname, "r")) == NULL) {
                sprintf(errmsg, "cannot open input file \"%s\"", fname);
                error(SYSTEM, errmsg);
        }
#ifdef _WIN32
        if (inform != 'a')
                SET_FILE_BINARY(fp);
#endif
                                        /* set up output */
        setoutput(outvals);
        switch (outform) {
        case 'a': putreal = puta; break;
        case 'f': putreal = putf; break;
        case 'd': putreal = putd; break;
        case 'c': 
                if (strcmp(outvals, "v"))
                        error(USER, "color format with value output only");
                break;
        default:
                error(CONSISTENCY, "botched output format");
        }
        if (hresolu > 0) {
                if (vresolu > 0)
                        fprtresolu(hresolu, vresolu, stdout);
                fflush(stdout);
        }
                                        /* process file */
        while (getvec(orig, inform, fp) == 0 &&
                        getvec(direc, inform, fp) == 0) {

                d = normalize(direc);
                if (d == 0.0) {                         /* zero ==> flush */
                        bogusray();
                        if (--nextflush <= 0 || vcount <= 0) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                } else {
                        samplendx++;
                                                        /* compute and print */
                        if (imm_irrad)
                                irrad(orig, direc);
                        else
                                rad(orig, direc, lim_dist ? d : 0.0);
                                                        /* flush if time */
                        if (--nextflush == 0) {
                                fflush(stdout);
                                nextflush = hresolu;
                        }
                }
                if (ferror(stdout))
                        error(SYSTEM, "write error");
                if (--vcount == 0)                      /* check for end */
                        break;
        }
        fflush(stdout);
        if (vcount > 0)
                error(USER, "read error");
        if (fname != NULL)
                fclose(fp);
}


setoutput(vs)                           /* set up output tables */
register char  *vs;
{
        extern void  (*trace)();
        register void (**table)() = ray_out;

        castonly = 1;
        while (*vs)
                switch (*vs++) {
                case 't':                               /* trace */
                        *table = NULL;
                        table = every_out;
                        trace = ourtrace;
                        castonly = 0;
                        break;
                case 'o':                               /* origin */
                        *table++ = oputo;
                        break;
                case 'd':                               /* direction */
                        *table++ = oputd;
                        break;
                case 'v':                               /* value */
                        *table++ = oputv;
                        castonly = 0;
                        break;
                case 'l':                               /* effective distance */
                        *table++ = oputl;
                        castonly = 0;
                        break;
                case 'c':                               /* local coordinates */
                        *table++ = oputc;
                        break;
                case 'L':                               /* single ray length */
                        *table++ = oputL;
                        break;
                case 'p':                               /* point */
                        *table++ = oputp;
                        break;
                case 'n':                               /* perturbed normal */
                        *table++ = oputn;
                        castonly = 0;
                        break;
                case 'N':                               /* unperturbed normal */
                        *table++ = oputN;
                        break;
                case 's':                               /* surface */
                        *table++ = oputs;
                        break;
                case 'w':                               /* weight */
                        *table++ = oputw;
                        break;
                case 'm':                               /* modifier */
                        *table++ = oputm;
                        break;
                }
        *table = NULL;
}


void
bogusray()                      /* print out empty record */
{
        thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
        thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        printvals(&thisray);
}


void
rad(org, dir, dmax)             /* compute and print ray value(s) */
FVECT  org, dir;
double  dmax;
{
        VCOPY(thisray.rorg, org);
        VCOPY(thisray.rdir, dir);
        thisray.rmax = dmax;
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
        if (castonly) {
                if (!localhit(&thisray, &thescene)) {
                        if (thisray.ro == &Aftplane) {  /* clipped */
                                thisray.ro = NULL;
                                thisray.rot = FHUGE;
                        } else
                                sourcehit(&thisray);
                }
        } else
                rayvalue(&thisray);
        printvals(&thisray);
}


void
irrad(org, dir)                 /* compute immediate irradiance value */
FVECT  org, dir;
{
        register int  i;

        for (i = 0; i < 3; i++) {
                thisray.rorg[i] = org[i] + dir[i];
                thisray.rdir[i] = -dir[i];
        }
        rayorigin(&thisray, NULL, PRIMARY, 1.0);
                                        /* pretend we hit surface */
        thisray.rot = 1.0-1e-4;
        thisray.rod = 1.0;
        VCOPY(thisray.ron, dir);
        for (i = 0; i < 3; i++)         /* fudge factor */
                thisray.rop[i] = org[i] + 1e-4*dir[i];
                                        /* compute and print */
        (*ofun[Lamb.otype].funp)(&Lamb, &thisray);
        printvals(&thisray);
}


void
printvals(r)                    /* print requested ray values */
RAY  *r;
{
        register void  (**tp)();

        if (ray_out[0] == NULL)
                return;
        for (tp = ray_out; *tp != NULL; tp++)
                (**tp)(r);
        if (outform == 'a')
                putchar('\n');
}


int
getvec(vec, fmt, fp)            /* get a vector from fp */
register FVECT  vec;
int  fmt;
FILE  *fp;
{
        static float  vf[3];
        static double  vd[3];
        char  buf[32];
        register int  i;

        switch (fmt) {
        case 'a':                                       /* ascii */
                for (i = 0; i < 3; i++) {
                        if (fgetword(buf, sizeof(buf), fp) == NULL ||
                                        !isflt(buf))
                                return(-1);
                        vec[i] = atof(buf);
                }
                break;
        case 'f':                                       /* binary float */
                if (fread((char *)vf, sizeof(float), 3, fp) != 3)
                        return(-1);
                vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
                break;
        case 'd':                                       /* binary double */
                if (fread((char *)vd, sizeof(double), 3, fp) != 3)
                        return(-1);
                vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
                break;
        default:
                error(CONSISTENCY, "botched input format");
        }
        return(0);
}


void
tranotify(obj)                  /* record new modifier */
OBJECT  obj;
{
        static int  hitlimit = 0;
        register OBJREC  *o = objptr(obj);
        register char  **tralp;

        if (obj == OVOID) {             /* starting over */
                traset[0] = 0;
                hitlimit = 0;
                return;
        }
        if (hitlimit || !ismodifier(o->otype))
                return;
        for (tralp = tralist; *tralp != NULL; tralp++)
                if (!strcmp(o->oname, *tralp)) {
                        if (traset[0] >= MAXTSET) {
                                error(WARNING, "too many modifiers in trace list");
                                hitlimit++;
                                return;         /* should this be fatal? */
                        }
                        insertelem(traset, obj);
                        return;
                }
}


static void
ourtrace(r)                             /* print ray values */
RAY  *r;
{
        register void  (**tp)();

        if (every_out[0] == NULL)
                return;
        if (r->ro == NULL) {
                if (traincl == 1)
                        return;
        } else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
                return;
        tabin(r);
        for (tp = every_out; *tp != NULL; tp++)
                (**tp)(r);
        putchar('\n');
}


static void
tabin(r)                                /* tab in appropriate amount */
RAY  *r;
{
        register RAY  *rp;

        for (rp = r->parent; rp != NULL; rp = rp->parent)
                putchar('\t');
}


static void
oputo(r)                                /* print origin */
RAY  *r;
{
        (*putreal)(r->rorg[0]);
        (*putreal)(r->rorg[1]);
        (*putreal)(r->rorg[2]);
}


static void
oputd(r)                                /* print direction */
RAY  *r;
{
        (*putreal)(r->rdir[0]);
        (*putreal)(r->rdir[1]);
        (*putreal)(r->rdir[2]);
}


static void
oputv(r)                                /* print value */
RAY  *r;
{
        COLR  cout;
        
        if (outform == 'c') {
                setcolr(cout,   colval(r->rcol,RED),
                                colval(r->rcol,GRN),
                                colval(r->rcol,BLU));
                fwrite((char *)cout, sizeof(cout), 1, stdout);
                return;
        }
        (*putreal)(colval(r->rcol,RED));
        (*putreal)(colval(r->rcol,GRN));
        (*putreal)(colval(r->rcol,BLU));
}


static void
oputl(r)                                /* print effective distance */
RAY  *r;
{
        (*putreal)(r->rt);
}


static void
oputL(r)                                /* print single ray length */
RAY  *r;
{
        (*putreal)(r->rot);
}


static void
oputc(r)                                /* print local coordinates */
RAY  *r;
{
        (*putreal)(r->uv[0]);
        (*putreal)(r->uv[1]);
}


static void
oputp(r)                                /* print point */
RAY  *r;
{
        if (r->rot < FHUGE) {
                (*putreal)(r->rop[0]);
                (*putreal)(r->rop[1]);
                (*putreal)(r->rop[2]);
        } else {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
        }
}


static void
oputN(r)                                /* print unperturbed normal */
RAY  *r;
{
        if (r->rot < FHUGE) {
                (*putreal)(r->ron[0]);
                (*putreal)(r->ron[1]);
                (*putreal)(r->ron[2]);
        } else {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
        }
}


static void
oputn(r)                                /* print perturbed normal */
RAY  *r;
{
        FVECT  pnorm;

        if (r->rot >= FHUGE) {
                (*putreal)(0.0);
                (*putreal)(0.0);
                (*putreal)(0.0);
                return;
        }
        raynormal(pnorm, r);
        (*putreal)(pnorm[0]);
        (*putreal)(pnorm[1]);
        (*putreal)(pnorm[2]);
}


static void
oputs(r)                                /* print name */
RAY  *r;
{
        if (r->ro != NULL)
                fputs(r->ro->oname, stdout);
        else
                putchar('*');
        putchar('\t');
}


static void
oputw(r)                                /* print weight */
RAY  *r;
{
        (*putreal)(r->rweight);
}


static void
oputm(r)                                /* print modifier */
RAY  *r;
{
        if (r->ro != NULL)
                if (r->ro->omod != OVOID)
                        fputs(objptr(r->ro->omod)->oname, stdout);
                else
                        fputs(VOIDID, stdout);
        else
                putchar('*');
        putchar('\t');
}


static void
puta(v)                         /* print ascii value */
double  v;
{
        printf("%e\t", v);
}


static void
putd(v)                         /* print binary double */
double  v;
{
        fwrite((char *)&v, sizeof(v), 1, stdout);
}


static void
putf(v)                         /* print binary float */
double  v;
{
        float f = v;

        fwrite((char *)&f, sizeof(f), 1, stdout);
}
Revision:	2.34
Committed:	Wed Sep 24 14:55:54 2003 UTC (22 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.33:	+7 -7 lines
Log Message:	Increased default ambient options in rpict, rtrace, rview, rad & mkillum
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.34	static const char RCSid[] = "$Id: rtrace.c,v 2.33 2003/07/21 22:30:19 schorsch Exp $";
3	greg	1.1	#endif
4			/*
5			* rtrace.c - program and variables for individual ray tracing.
6	greg	2.27	*/
7
8	greg	2.28	#include "copyright.h"
9	greg	1.1
10			/*
11			* Input is in the form:
12			*
13			* xorg yorg zorg xdir ydir zdir
14			*
15			* The direction need not be normalized. Output is flexible.
16	greg	1.7	* If the direction vector is (0,0,0), then the output is flushed.
17	greg	1.1	* All values default to ascii representation of real
18			* numbers. Binary representations can be selected
19			* with '-ff' for float or '-fd' for double. By default,
20	greg	1.13	* radiance is computed. The '-i' or '-I' options indicate that
21	greg	1.1	* irradiance values are desired.
22			*/
23	greg	2.32
24			#include <time.h>
25	greg	1.1
26	schorsch	2.30	#include "platform.h"
27	greg	1.1	#include "ray.h"
28			#include "otypes.h"
29	greg	2.6	#include "resolu.h"
30
31	greg	2.27	CUBE thescene; /* our scene */
32			OBJECT nsceneobjs; /* number of objects in our scene */
33
34	greg	1.14	int dimlist[MAXDIM]; /* sampling dimensions */
35			int ndims = 0; /* number of sampling dimensions */
36			int samplendx = 0; /* index for this sample */
37
38	greg	1.13	int imm_irrad = 0; /* compute immediate irradiance? */
39	gregl	2.25	int lim_dist = 0; /* limit distance? */
40	greg	1.13
41	greg	1.1	int inform = 'a'; /* input format */
42			int outform = 'a'; /* output format */
43			char outvals = "v"; / output specification */
44
45	greg	2.27	int do_irrad = 0; /* compute irradiance? */
46
47			void (trace)() = NULL; / trace call */
48
49			extern void ambnotify(), tranotify();
50			void (*addobjnotify[])() = {ambnotify, tranotify, NULL};
51	greg	2.15	char tralist[128]; / list of modifers to trace (or no) */
52			int traincl = -1; /* include == 1, exclude == 0 */
53			#define MAXTSET 511 /* maximum number in trace set */
54			OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */
55
56	greg	1.1	int hresolu = 0; /* horizontal (scan) size */
57			int vresolu = 0; /* vertical resolution */
58
59			double dstrsrc = 0.0; /* square source distribution */
60	greg	1.4	double shadthresh = .05; /* shadow threshold */
61	greg	1.5	double shadcert = .5; /* shadow certainty */
62	greg	2.19	int directrelay = 2; /* number of source relays */
63	greg	1.17	int vspretest = 512; /* virtual source pretest density */
64	greg	2.10	int directvis = 1; /* sources visible? */
65	greg	2.19	double srcsizerat = .2; /* maximum ratio source size/dist. */
66	greg	2.20
67			COLOR cextinction = BLKCOLOR; /* global extinction coefficient */
68	greg	2.22	COLOR salbedo = BLKCOLOR; /* global scattering albedo */
69	greg	2.20	double seccg = 0.; /* global scattering eccentricity */
70			double ssampdist = 0.; /* scatter sampling distance */
71	greg	1.1
72	greg	2.4	double specthresh = .15; /* specular sampling threshold */
73	greg	2.3	double specjitter = 1.; /* specular sampling jitter */
74
75	greg	2.18	int backvis = 1; /* back face visibility */
76
77	greg	2.34	int maxdepth = 8; /* maximum recursion depth */
78			double minweight = 2e-3; /* minimum ray weight */
79	greg	1.1
80	greg	2.27	char ambfile = NULL; / ambient file name */
81	greg	1.1	COLOR ambval = BLKCOLOR; /* ambient value */
82	greg	2.21	int ambvwt = 0; /* initial weight for ambient value */
83	greg	2.34	double ambacc = 0.1; /* ambient accuracy */
84			int ambres = 256; /* ambient resolution */
85			int ambdiv = 1024; /* ambient divisions */
86			int ambssamp = 512; /* ambient super-samples */
87	greg	1.1	int ambounce = 0; /* ambient bounces */
88			char amblist[128]; / ambient include/exclude list */
89			int ambincl = -1; /* include == 1, exclude == 0 */
90
91	gregl	2.25
92	greg	1.1	static RAY thisray; /* for our convenience */
93
94	greg	2.29	static void oputo(), oputd(), oputv(), oputl(), oputL(), oputc(),
95	greg	2.9	oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
96	greg	1.1
97	greg	2.27	static void ourtrace(), tabin();
98			static void (ray_out[16])(), (every_out[16])();
99	greg	2.14	static int castonly = 0;
100	greg	1.1
101	greg	2.27	static void puta(), putf(), putd();
102
103			static void (*putreal)();
104	greg	1.1
105	greg	2.27	void bogusray(), rad(), irrad(), printvals();
106	greg	1.1
107
108	greg	2.27	void
109	greg	1.1	quit(code) /* quit program */
110			int code;
111			{
112	schorsch	2.31	#ifndef NON_POSIX /* XXX we don't clean up elsewhere? */
113	greg	2.11	headclean(); /* delete header file */
114			pfclean(); /* clean up persist files */
115			#endif
116	greg	1.1	exit(code);
117			}
118
119
120	greg	2.6	char *
121			formstr(f) /* return format identifier */
122			int f;
123			{
124			switch (f) {
125			case 'a': return("ascii");
126			case 'f': return("float");
127			case 'd': return("double");
128			case 'c': return(COLRFMT);
129			}
130			return("unknown");
131			}
132
133
134	greg	2.27	void
135	greg	1.1	rtrace(fname) /* trace rays from file */
136			char *fname;
137			{
138			long vcount = hresolu>1 ? hresolu*vresolu : vresolu;
139			long nextflush = hresolu;
140			FILE *fp;
141	gregl	2.25	double d;
142	greg	1.2	FVECT orig, direc;
143	greg	1.1	/* set up input */
144			if (fname == NULL)
145			fp = stdin;
146			else if ((fp = fopen(fname, "r")) == NULL) {
147			sprintf(errmsg, "cannot open input file \"%s\"", fname);
148			error(SYSTEM, errmsg);
149			}
150	schorsch	2.30	#ifdef _WIN32
151	greg	2.8	if (inform != 'a')
152	schorsch	2.30	SET_FILE_BINARY(fp);
153	greg	2.8	#endif
154	greg	1.1	/* set up output */
155	greg	2.16	setoutput(outvals);
156	greg	1.1	switch (outform) {
157			case 'a': putreal = puta; break;
158			case 'f': putreal = putf; break;
159			case 'd': putreal = putd; break;
160	greg	2.6	case 'c':
161			if (strcmp(outvals, "v"))
162			error(USER, "color format with value output only");
163			break;
164			default:
165			error(CONSISTENCY, "botched output format");
166	greg	1.1	}
167	greg	2.12	if (hresolu > 0) {
168			if (vresolu > 0)
169			fprtresolu(hresolu, vresolu, stdout);
170			fflush(stdout);
171			}
172	greg	1.1	/* process file */
173			while (getvec(orig, inform, fp) == 0 &&
174			getvec(direc, inform, fp) == 0) {
175
176	gregl	2.25	d = normalize(direc);
177			if (d == 0.0) { /* zero ==> flush */
178	gregl	2.24	bogusray();
179	gregl	2.26	if (--nextflush <= 0 \|\| vcount <= 0) {
180	gregl	2.24	fflush(stdout);
181			nextflush = hresolu;
182			}
183			} else {
184			samplendx++;
185	greg	1.1	/* compute and print */
186	gregl	2.24	if (imm_irrad)
187			irrad(orig, direc);
188			else
189	gregl	2.25	rad(orig, direc, lim_dist ? d : 0.0);
190	greg	1.7	/* flush if time */
191	gregl	2.24	if (--nextflush == 0) {
192			fflush(stdout);
193			nextflush = hresolu;
194			}
195	greg	1.1	}
196			if (ferror(stdout))
197			error(SYSTEM, "write error");
198			if (--vcount == 0) /* check for end */
199			break;
200			}
201	greg	2.12	fflush(stdout);
202	greg	1.1	if (vcount > 0)
203			error(USER, "read error");
204	greg	2.12	if (fname != NULL)
205			fclose(fp);
206	greg	1.1	}
207
208
209			setoutput(vs) /* set up output tables */
210			register char *vs;
211			{
212	greg	2.27	extern void (*trace)();
213			register void (**table)() = ray_out;
214	greg	1.1
215	greg	1.11	castonly = 1;
216	greg	1.1	while (*vs)
217			switch (*vs++) {
218			case 't': /* trace */
219			*table = NULL;
220			table = every_out;
221			trace = ourtrace;
222	greg	1.11	castonly = 0;
223	greg	1.1	break;
224			case 'o': /* origin */
225			*table++ = oputo;
226			break;
227			case 'd': /* direction */
228			*table++ = oputd;
229			break;
230			case 'v': /* value */
231			*table++ = oputv;
232	greg	1.11	castonly = 0;
233	greg	1.1	break;
234	greg	2.5	case 'l': /* effective distance */
235	greg	1.1	*table++ = oputl;
236	greg	1.11	castonly = 0;
237	greg	1.1	break;
238	greg	2.29	case 'c': /* local coordinates */
239			*table++ = oputc;
240			break;
241	greg	2.5	case 'L': /* single ray length */
242			*table++ = oputL;
243			break;
244	greg	1.1	case 'p': /* point */
245			*table++ = oputp;
246			break;
247	greg	2.9	case 'n': /* perturbed normal */
248	greg	1.1	*table++ = oputn;
249	greg	2.9	castonly = 0;
250	greg	1.1	break;
251	greg	2.9	case 'N': /* unperturbed normal */
252			*table++ = oputN;
253			break;
254	greg	1.1	case 's': /* surface */
255			*table++ = oputs;
256			break;
257			case 'w': /* weight */
258			*table++ = oputw;
259			break;
260			case 'm': /* modifier */
261			*table++ = oputm;
262			break;
263			}
264			*table = NULL;
265	gregl	2.24	}
266
267
268	greg	2.27	void
269	gregl	2.24	bogusray() /* print out empty record */
270			{
271			thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] =
272			thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0;
273			rayorigin(&thisray, NULL, PRIMARY, 1.0);
274			printvals(&thisray);
275	greg	1.1	}
276
277
278	greg	2.27	void
279	gregl	2.25	rad(org, dir, dmax) /* compute and print ray value(s) */
280	greg	1.1	FVECT org, dir;
281	gregl	2.25	double dmax;
282	greg	1.1	{
283			VCOPY(thisray.rorg, org);
284			VCOPY(thisray.rdir, dir);
285	gregl	2.25	thisray.rmax = dmax;
286	greg	1.1	rayorigin(&thisray, NULL, PRIMARY, 1.0);
287	gregl	2.25	if (castonly) {
288	schorsch	2.33	if (!localhit(&thisray, &thescene)) {
289	gregl	2.25	if (thisray.ro == &Aftplane) { /* clipped */
290			thisray.ro = NULL;
291			thisray.rot = FHUGE;
292			} else
293			sourcehit(&thisray);
294	schorsch	2.33	}
295	gregl	2.25	} else
296	greg	1.11	rayvalue(&thisray);
297	greg	2.16	printvals(&thisray);
298	greg	1.1	}
299
300
301	greg	2.27	void
302	greg	1.13	irrad(org, dir) /* compute immediate irradiance value */
303	greg	1.1	FVECT org, dir;
304			{
305			register int i;
306
307			for (i = 0; i < 3; i++) {
308			thisray.rorg[i] = org[i] + dir[i];
309			thisray.rdir[i] = -dir[i];
310			}
311			rayorigin(&thisray, NULL, PRIMARY, 1.0);
312			/* pretend we hit surface */
313	greg	2.16	thisray.rot = 1.0-1e-4;
314	greg	1.1	thisray.rod = 1.0;
315			VCOPY(thisray.ron, dir);
316			for (i = 0; i < 3; i++) /* fudge factor */
317			thisray.rop[i] = org[i] + 1e-4*dir[i];
318			/* compute and print */
319			(*ofun[Lamb.otype].funp)(&Lamb, &thisray);
320	greg	2.16	printvals(&thisray);
321			}
322
323
324	greg	2.27	void
325	greg	2.16	printvals(r) /* print requested ray values */
326			RAY *r;
327			{
328	greg	2.27	register void (**tp)();
329	greg	2.16
330			if (ray_out[0] == NULL)
331			return;
332			for (tp = ray_out; *tp != NULL; tp++)
333			(**tp)(r);
334	greg	1.1	if (outform == 'a')
335			putchar('\n');
336			}
337
338
339	greg	2.27	int
340	greg	1.1	getvec(vec, fmt, fp) /* get a vector from fp */
341			register FVECT vec;
342			int fmt;
343			FILE *fp;
344			{
345			static float vf[3];
346	greg	2.5	static double vd[3];
347	greg	1.19	char buf[32];
348			register int i;
349	greg	1.1
350			switch (fmt) {
351			case 'a': /* ascii */
352	greg	1.19	for (i = 0; i < 3; i++) {
353			if (fgetword(buf, sizeof(buf), fp) == NULL \|\|
354			!isflt(buf))
355			return(-1);
356			vec[i] = atof(buf);
357			}
358	greg	1.1	break;
359			case 'f': /* binary float */
360	greg	1.8	if (fread((char *)vf, sizeof(float), 3, fp) != 3)
361	greg	1.1	return(-1);
362			vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2];
363			break;
364			case 'd': /* binary double */
365	greg	2.5	if (fread((char *)vd, sizeof(double), 3, fp) != 3)
366	greg	1.1	return(-1);
367	greg	2.5	vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2];
368	greg	1.1	break;
369	greg	2.6	default:
370			error(CONSISTENCY, "botched input format");
371	greg	1.1	}
372			return(0);
373			}
374
375
376	greg	2.27	void
377	greg	2.15	tranotify(obj) /* record new modifier */
378			OBJECT obj;
379			{
380			static int hitlimit = 0;
381			register OBJREC *o = objptr(obj);
382			register char **tralp;
383
384	greg	2.27	if (obj == OVOID) { /* starting over */
385			traset[0] = 0;
386			hitlimit = 0;
387			return;
388			}
389	greg	2.15	if (hitlimit \|\| !ismodifier(o->otype))
390			return;
391			for (tralp = tralist; *tralp != NULL; tralp++)
392			if (!strcmp(o->oname, *tralp)) {
393			if (traset[0] >= MAXTSET) {
394			error(WARNING, "too many modifiers in trace list");
395			hitlimit++;
396			return; /* should this be fatal? */
397			}
398			insertelem(traset, obj);
399			return;
400			}
401			}
402
403
404	greg	2.27	static void
405	greg	1.1	ourtrace(r) /* print ray values */
406			RAY *r;
407			{
408	greg	2.27	register void (**tp)();
409	greg	1.1
410			if (every_out[0] == NULL)
411	greg	2.15	return;
412	greg	2.16	if (r->ro == NULL) {
413			if (traincl == 1)
414			return;
415			} else if (traincl != -1 && traincl != inset(traset, r->ro->omod))
416	greg	1.1	return;
417			tabin(r);
418			for (tp = every_out; *tp != NULL; tp++)
419			(**tp)(r);
420			putchar('\n');
421			}
422
423
424	greg	2.27	static void
425	greg	1.1	tabin(r) /* tab in appropriate amount */
426			RAY *r;
427			{
428			register RAY *rp;
429
430			for (rp = r->parent; rp != NULL; rp = rp->parent)
431			putchar('\t');
432			}
433
434
435	greg	2.27	static void
436	greg	1.1	oputo(r) /* print origin */
437	greg	2.29	RAY *r;
438	greg	1.1	{
439			(*putreal)(r->rorg[0]);
440			(*putreal)(r->rorg[1]);
441			(*putreal)(r->rorg[2]);
442			}
443
444
445	greg	2.27	static void
446	greg	1.1	oputd(r) /* print direction */
447	greg	2.29	RAY *r;
448	greg	1.1	{
449			(*putreal)(r->rdir[0]);
450			(*putreal)(r->rdir[1]);
451			(*putreal)(r->rdir[2]);
452			}
453
454
455	greg	2.27	static void
456	greg	1.1	oputv(r) /* print value */
457	greg	2.29	RAY *r;
458	greg	1.1	{
459	greg	2.6	COLR cout;
460
461			if (outform == 'c') {
462			setcolr(cout, colval(r->rcol,RED),
463			colval(r->rcol,GRN),
464			colval(r->rcol,BLU));
465			fwrite((char *)cout, sizeof(cout), 1, stdout);
466			return;
467			}
468	greg	1.1	(*putreal)(colval(r->rcol,RED));
469			(*putreal)(colval(r->rcol,GRN));
470			(*putreal)(colval(r->rcol,BLU));
471			}
472
473
474	greg	2.27	static void
475	greg	2.5	oputl(r) /* print effective distance */
476	greg	2.29	RAY *r;
477	greg	1.1	{
478	greg	1.9	(*putreal)(r->rt);
479	greg	2.5	}
480
481
482	greg	2.27	static void
483	greg	2.5	oputL(r) /* print single ray length */
484	greg	2.29	RAY *r;
485	greg	2.5	{
486			(*putreal)(r->rot);
487	greg	1.1	}
488
489
490	greg	2.27	static void
491	greg	2.29	oputc(r) /* print local coordinates */
492			RAY *r;
493			{
494			(*putreal)(r->uv[0]);
495			(*putreal)(r->uv[1]);
496			}
497
498
499			static void
500	greg	1.1	oputp(r) /* print point */
501	greg	2.29	RAY *r;
502	greg	1.1	{
503			if (r->rot < FHUGE) {
504			(*putreal)(r->rop[0]);
505			(*putreal)(r->rop[1]);
506			(*putreal)(r->rop[2]);
507			} else {
508			(*putreal)(0.0);
509			(*putreal)(0.0);
510			(*putreal)(0.0);
511			}
512			}
513
514
515	greg	2.27	static void
516	greg	2.9	oputN(r) /* print unperturbed normal */
517	greg	2.29	RAY *r;
518	greg	1.1	{
519			if (r->rot < FHUGE) {
520			(*putreal)(r->ron[0]);
521			(*putreal)(r->ron[1]);
522			(*putreal)(r->ron[2]);
523			} else {
524			(*putreal)(0.0);
525			(*putreal)(0.0);
526			(*putreal)(0.0);
527			}
528	greg	2.9	}
529
530
531	greg	2.27	static void
532	greg	2.9	oputn(r) /* print perturbed normal */
533			RAY *r;
534			{
535			FVECT pnorm;
536
537			if (r->rot >= FHUGE) {
538			(*putreal)(0.0);
539			(*putreal)(0.0);
540			(*putreal)(0.0);
541			return;
542			}
543			raynormal(pnorm, r);
544			(*putreal)(pnorm[0]);
545			(*putreal)(pnorm[1]);
546			(*putreal)(pnorm[2]);
547	greg	1.1	}
548
549
550	greg	2.27	static void
551	greg	1.1	oputs(r) /* print name */
552	greg	2.29	RAY *r;
553	greg	1.1	{
554			if (r->ro != NULL)
555			fputs(r->ro->oname, stdout);
556			else
557			putchar('*');
558			putchar('\t');
559			}
560
561
562	greg	2.27	static void
563	greg	1.1	oputw(r) /* print weight */
564	greg	2.29	RAY *r;
565	greg	1.1	{
566			(*putreal)(r->rweight);
567			}
568
569
570	greg	2.27	static void
571	greg	1.1	oputm(r) /* print modifier */
572	greg	2.29	RAY *r;
573	greg	1.1	{
574			if (r->ro != NULL)
575	greg	2.23	if (r->ro->omod != OVOID)
576			fputs(objptr(r->ro->omod)->oname, stdout);
577			else
578			fputs(VOIDID, stdout);
579	greg	1.1	else
580			putchar('*');
581			putchar('\t');
582			}
583
584
585	greg	2.27	static void
586	greg	1.1	puta(v) /* print ascii value */
587			double v;
588			{
589			printf("%e\t", v);
590			}
591
592
593	greg	2.27	static void
594	greg	1.1	putd(v) /* print binary double */
595			double v;
596			{
597	greg	1.8	fwrite((char *)&v, sizeof(v), 1, stdout);
598	greg	1.1	}
599
600
601	greg	2.27	static void
602	greg	1.1	putf(v) /* print binary float */
603			double v;
604			{
605			float f = v;
606
607	greg	1.8	fwrite((char *)&f, sizeof(f), 1, stdout);
608	greg	1.1	}